Follow the various links to the pages of tiers of characters.
Here you will find the guy & gals whom the story (generally) revolves around.
The Big Four.
These are very important people and although they don't necessarily have what it takes to be main players, they are close enough that the Quest either a) couldn't exist without them or b) wouldn't be the same without them.
Not quite so important. These folks maybe have a scene or two or are merely talked about in flashbacks and stories but not necessarily seen.
You'll be lucky if you even remember who these fools are.